Ahli claimed a relatively-vital 1-1 draw at Berekum Chelsea despite wasting an easy chance to secure their Champions League semi-final berth.
A first-half goal from Ivorian striker Oussou Konan was cancelled by Darko Opoko shortly after the break as both sides missed a number of chances to settle the game.
The draw gave Group B leaders Ahli their 10th point from four games as Chelsea move to second on five.
Summer signing Konan broke the deadlock when he followed in a Mohamed Abou-Treika header that hit the post.
In the second half, Opoko pounced on a poor piece of defending by the visitors to slam home a left-footed half-volley past Sherif Ekrami.
From that point, Chelsea played an ultra-attacking game and were far from secured at the back, with Abou-Treika missing a free header from close range.
Substitute Dominique da Silva then had a chance to kill the game off but skied the ball high when he was one-on-one with the keeper.
At the other end, Chelsea ace Emmanuel Clottey dribbled brilliantly past a defender before squaring to strike partner Bismark Idan, who shockingly missed an empty net before going off injured.
With one minute remaining, Chelsea made another serious threat when Jackson Owusu saw his superb freekick bounce off the bar.
The best chance of the match came at the mercy of substitute Mohamed Barakat, who had all the time in the world to fire home in injury time, but his poor finish could only hit the keeper’s legs.